"Ji Yun, try not to have disputes with the Seven Princes in the future, it's not good for you!" Qu Shansi kindly reminded, from the contrast between his attitude, it can be seen that this person is definitely a madman, a madman who studies mechanics. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

As long as it comes to the field he likes, he loves the house and the Wuxia, and he doesn't care about any prince.

Ji Yun was originally very uninterested in this person, but at this moment, he thought about it, and had a good relationship with this person, if there were rare pills or other treasures in the Gewu Academy in the future, he would be able to grasp the first-hand news.

Gong Yizhen glanced at Ji Shaohong's side, and snorted: "It's not Xiao Yunzi who provokes him, but they are determined to provoke Xiao Yunzi!"

Qu Shansi shook his head: "That's not necessarily, they were worried that Ji Yun's qualifications were too poor before, which would affect the assessment results of the Gewu Academy next year, but now Ji Yun's wisdom will only add luster to the Gewu Academy!"

Gong Yi Zhen sneered: "Don't forget, the emperor said that students who don't have outstanding grades will be stripped of their titles, Ji Yun is Mu Xiu Yulin today, poking at their sore spots, it will only be more crazy in the future, and even I suspect that after school this afternoon, they will be unfavorable to Xiao Yunzi!"

"It's a pity, that Holy Pill was stolen by thieves, otherwise those old guys would definitely study it thoroughly, and I would have made one for Ji Yun if I said anything, but now..."Qu Shansi looked angry and gritted his teeth.

"I'll take you home after school, and I'll go see your mother by the way. Gong Zhen squeezed out a smile.

Ji Yun was moved in his heart, waved his hand and said, "No need, I want to see what they can do, uncle, grandfather and other uncles, how are they?"

Qu Shansi saw that his nephew and uncle were talking about family affairs, so it was inconvenient to sit anymore, so he got up and drank tea.

The two chatted for a while, and Ji Yun suddenly remembered the ruler: "Uncle, haven't you ever thought about formulating a complete set of length units?"

Gong Yi was stunned for a moment, and then said: "Is the current unit of length incomplete?"

Ji Yun shook his head and picked up a grain of rice: "How thick is this grain?"

Gong Yi was stunned: "Three points!"

Ji Yun shook his head: "What are three points?

He suddenly didn't know what to say, because he realized that it was like how one meter was defined as 'one meter', and how that length came about.

The unit of the earth's 'meter' has also undergone several changes, from the definition of 1/40 millionth of the total length of the meridian at the beginning, to the later 'archive meter', to the multiple of the wavelength of the radiation in a vacuum of the Krypton-86 atomic energy level transition, and then to the distance traveled by light in a vacuum in a fraction of a second is called a meter.

So how do you calculate the length of this world?

"No matter how he calculates, at least it's convenient to record and describe!"

Thinking of this, Ji Yun's heart moved, his mind pressed F1, and he meditated in his heart: meter ruler.

As soon as the thought fell, his right hand couldn't help but tremble, and then his nails drew a meter long distance on the table.

The public lost the shock and looked at it curiously.

I saw Ji Yun's fingers flying quickly on the table, and the one-meter-long line just now was divided into a hundred equal parts by him, and then divided again.

"What kind of ruler is this?" As soon as Gong Zhenzhen saw the lines of different lengths, he knew that this was a ruler.

He took his ruler and put it on the scale mark drawn by Ji Yun, showing that the length was only more than twenty small squares.

"Uncle, you see, is this unit of length more accurate than the one we use now?"

Ji Yun began to explain in detail the proportions of the units of length, and the more he listened to the shock, the brighter his eyes became, and Ji Yun's way of measuring was obviously more refined and accurate, and most importantly, the division was clear.

The well-known length is that one zhang is equal to ten feet, one foot is equal to three inches, and one inch is equal to three points.

And Ji Yun mentioned at the moment that one meter is equal to ten meters, one decimeter is equal to ten centimeters, one centimeter is equal to ten millimeters, and the smallest millimeter is microns, which is simple and clear, and it is very easy to be recognized, and it is more accurate than the previous zhang, ruler, and inch.

And in this way, there is the most basic unit - the meter!

At this time, Qu Shansi also came over, and when he heard what Ji Yun was explaining, he listened curiously, but this hearing was out of control.

Although length units have always existed, no one has ever thought of integrating them, which makes some measurements extremely difficult.

"Good guy!" Qu Shansi shouted, which immediately attracted everyone's sideways.

"Why didn't I ever think of formulating a new unit of length? Did you know that every year, the Academy sends hundreds of people to improve my territory map, but it has never been able to get the best perfection. ”

Qu Shansi's eyes were scorching: "Because whether it is li, zhang, ruler, or inch, it cannot be perfectly compressed, and the error of the proportion on the length unit leads to a very huge difference between the proportion on the map and the actual distance, and if you use the length unit you proposed to measure, the compression ratio can be the most perfect!"

Gong Zhenzhen had wanted to say it for a long time, and took out a ruler with his backhand, but it was an acutely angled triangle, "I'll try it!"

As he spoke, he measured the three sides of the triangle plate on the meter ruler carved out by Ji Yun.

"Thirty centimeters, forty centimeters, fifty centimeters... It's so convenient, the hook is three, the strand is four, and the string is five! It's so much more convenient than the few inches I used to use!"

The public was overjoyed and shouted excitedly.

"Brother Qu, quickly, notify the dean, let him write to the emperor, and reform the unit of measurement!"

Qu Shansi hurriedly shouted: "Wait first, this is the template! In the future, I will build a ruler according to this length, yes, listen to Ji Yun, it will be called a meter ruler!"

As he spoke, he found an iron ruler out of nowhere, and muttered to himself: "This is a black steel ruler, originally three feet long, which can be exposed to the air for thousands of years without deformation, so I'll make one... Ji Yun, what's that called?"

Gong Zhen laughed: "The file ruler is the standard length of one meter! As a template for making a meter ruler in the future, it will be stored as an archive!"

"Yes, file ruler!" Qu Shansi was cautious, only to see his fingertips spew out a needle-like energy, and with a light stroke on the black steel ruler, a nick immediately appeared, and in the blink of an eye, a meter ruler with a minimum unit of millimeters was formed.

This meter ruler is absolutely standardized, and Chu Wuji believes in the keyboard.

"This small grid is a millimeter, this grid is a centimeter......" Qu Shansi began to engrave small handwriting on it again.

"It's done!"

He raised his hand and waved, and the energy in his fingertips suddenly turned into a thin knife, and only a soft sound of 'snort' was heard, and the excess Xuangang ruler was neatly slashed off.

"This is Gang Qi! Only a Dao Realm master who 'cultivates Qi Cheng Gang' can do it, and the aura of cultivation can be transformed into Gang Qi, which can be transformed into tangible things!" Ji Yun felt a wave of eagerness in his heart, one day, he would do it too!

"It's convenient, it's so convenient!" Qu Shansi muttered to himself with admiration.

"Uncle, if your kind of steel bar can be made thinner, and the length can be carved on it, if there are a few meters, dozens of meters, I guess it will be of great help to the building!" Ji Yun once again introduced such a thing as a 'tape measure'.

"What kind of steel bar is used, how heavy is it not good to bring, the wild golden snow beast leather is no better! This monster beast leather is tough, after boiling water, it is extremely difficult to deform, and the color is snow-white, soft and thin, after the people often buy, several layers of glued up to make leather boots, extremely firm, if used to make a meter ruler, wouldn't it be more convenient?"

"Yes, in this way, it can even mobilize the market price of Jinxue animal skin!" Qu Shansi echoed and clapped.

"I'll go to the dean immediately!Oh yes, this is Ji Yun's invention!" Qu Shansi deliberately emphasized.

"What? This is also an invention?" The students had already come together, and they did find that Ji Yun's unit of measurement was easier to understand, and it was easier to record and judge, but Ji Shaohong was unwilling.

"Yes, what kind of invention is this? Then I said that my foot is a paragraph, so can my 'paragraph' also become a unit of measurement?" Ji Shaoming looked disdainful.

Ji Yun sneered in his heart, and turned his head to look at Qu Shansi: "Teacher, this is indeed not an invention, anyone can imagine it, students only hope that it will be more convenient for the people to record the distance in the future!"

Qu Shansi glanced at a few princes, then looked at Ji Yun, took a deep breath, nodded slowly, shook his body and rushed into the sky, flying into the distance.

"There are so many big masters, fortunately I didn't meet them that day, otherwise even if I had the 'enter' key of the keyboard, I would have been easily discovered!" Ji Yun secretly reminded himself in his heart.

"Hey, Xiaoyunzi, okay, in a blink of an eye, the two teachers will be done? And... How do you become ...... Not like you?" Yun Gui leaned over and asked in a somewhat curious whisper.

Ji Yun patted Yungui on the shoulder and lowered his voice: "When I have time, I will study a few theorem truths and the like for you, so as to ensure that you will not be punished in the assessment next year!"

"I don't believe it!" Yun Gui pouted, "The truth can stand up to scrutiny, you can study it casually?"

"Believe it or not!" Ji Yun sneered in his heart, I know more about the truth of the theorem, and I still need to scrutinize it?

"Your Highness, this bear has stepped on the dog's shit luck, why did he suddenly become so smart? Qu Shansi is all towards him, I'm afraid we won't be able to do it. Wen Cheng squinted at Ji Yun who was surrounded by the crowd, revealing a little worry.

"I'm afraid of a fart! From Gewu Zhizhi Yuan to Lingwang Mansion, it will take half an hour!" Ji Shaohong's voice was cold, "But for the time being, it can't end his life, there are some things you don't understand!"

Wen Cheng slowly bowed his head, but his heart was thinking quickly.

He doesn't understand? It's strange that he doesn't understand.

Ji Shaohong's words revealed the emperor's meaning, which proved that the emperor was still a little jealous of his own brother, and he didn't dare to completely provoke Ji Chongxiao.

"The emperor is jealous of Ji Chongxiao, it is nothing more than the military power in Ji Chongxiao's hands, the eight marquis are almost all Ji Chongxiao's friends of life and death, but now that the eight have gone to four, they have been replaced by the emperor's people, if there are two more marquis to be replaced, I am afraid it is time for the emperor to attack Ji Chongxiao!"

"Alright, the lunch break is over, and it's time to get up for class!" Gong Yizhen looked at the copper kettle dripping, stood up and clapped his hands.